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Page Title:
Table 2-1. Direct Support and General Support Troubleshooting Table - continued |
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 TM5-241O-237-34
Table 2-1.
Direct Support and General Support Troubleshooting Table (Cont'd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4.
Check fuel setting (page 4-33).
If necessary, adjust fuel setting (page 4-33).
Step 5.
Disassemble turbocharger and check for carbon deposits and other causes
of friction (page 4-18).
END OF TESTING!
18. ENGINE FUEL KNOCKS
Step 1.
Operate engine at rpm where maximum combustion noise occurs. Loosen the
fuel line nut at a fuel injection pump. This will stop fuel flow to that
cylinder. Do this for each cylinder until a loosened fuel line stops the
combustion noise. Be sure to tighten each fuel line nut after the test
before the next fuel line nut is loosened.
When a cylinder is found where the loosened line stops the knock, test the
fuel injection nozzle for that cylinder (page 4-8).
Repair (page 4-8) or replace defective nozzle (TM5-241O-237-2O).
a.
b.
If nozzle is operating properly, replace the fuel injection pump for
that cylinder (page 4-14).
Step 2.
Check fuel injection timing (page 4-26).
Adjust timing if necessary (page 4-26).
END OF TESTING!
19. EXCESSIVE FUEL CONSUMPTION
Step 1.
Check for fuel in engine lubricating oil.
a. If fuel is present, test fuel injection nozzles (page 4-8).
b.
Drain engine lubricating oil, install new oil filter, and refill
crankcase (TM5-241O-237-2O).
Step 2.
Check fuel injection timing (page 4-26).
Adjust timing if necessary (page 4-26).
END OF TESTING!
2-14
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